Log Message:
Update to soprano 2.2

 * The AsyncModel now has a "real" asyncroneous mode which uses multiple
   threads to execute the commands.
 * New class Soprano::Client::SparqlModel which provides a client to http
   Sparql endpoints.
 * Added method Node::toN3 to easily build SPARQL queries without having
   to encode nodes all the time.
 * New convinience method QueryResultIterator::iterateStatementsFromBindings
 * Added convinience methods to handle BackendSettings.
 * Added operator[] to QueryResultIterator to easily access bindings
 * Added parameters influencing the visibility to onto2vocabularyclass
 * Soprano::Node now comes with definitions of qHash for both Node and QUrl
 * Sesame2 updated to 2.1.4
 * The IndexFilterModel can now optionally index specific URIs
   (IndexFilterModel::setForceIndexPredicates)
 * Added method IndexFilterModel::optimizeIndex which optimizes the clucene
   index on disk
 * Added method IndexFilterModel::encodeUriForLuceneQuery which
   encodes/escapes a URI so it can be used as a field in a clucene query.
 * SPARQL endpoint query support in sopranocmd
 * Performace improvements